Results 41 to 50 of about 20,464 (181)

Some Results on Smarandache Semigroups

Journal of Kufa for Mathematics and Computer, 2013
We discusse in this paper a Smarandache semigroups , a Smarandache  cyclic semigroups and a Smarandache lagrange semigroups.We prove that the Smarandache semigroup with multiplication modulo 2P where p is an odd prime have two subgroups of order P-1and
Sajda Kadhum Mohammed
doaj   +1 more source

Control of Open Quantum Systems via Dynamical Invariants

Advanced Quantum Technologies, Volume 9, Issue 2, February 2026.
Dynamical invariants are used to reverse‐engineer control fields for open quantum systems described by time‐dependent Lindblad master equations. By minimizing an analytic leakage functional, the protocol dynamically steers the state along an effectively decoherence‐free path without costly iterative propagation.
Loris M. Cangemi, Hilario Espinós, Ricardo Puebla, Erik Torrontegui, Amikam Levy   +4 more
wiley   +1 more source

Twisted actions and regular Fell bundles over inverse semigroups

, 2010
We introduce a new notion of twisted actions of inverse semigroups and show that they correspond bijectively to certain regular Fell bundles over inverse semigroups, yielding in this way a structure classification of such bundles.
Buss, Alcides, Exel, Ruy
core   +1 more source

Cazenave‐Dickstein‐Weissler‐Type Extension of Fujita'S Problem on Heisenberg Groups

Mathematical Methods in the Applied Sciences, Volume 49, Issue 2, Page 499-511, 30 January 2026.
ABSTRACT This paper investigates the Fujita critical exponent for a heat equation with nonlinear memory posed on the Heisenberg groups. A sharp threshold is identified such that, for exponent values less than or equal to this critical value, no global solution exists, regardless of the choice of nonnegative initial data. Conversely, for exponent values
Mokhtar Kirane, Ahmad Z. Fino, Berikbol T. Torebek, Zineb Sabbagh   +3 more
wiley   +1 more source

Zappa–Szép Groupoids of Inverse Semigroups and an Alternative Proof of Billhardt’s λ-Semidirect Products

Mathematics
The aim of this paper is to introduce and study Zappa-Szép groupoids of inverse semigroups. Some properties of such kinds of groupoids are explored. As an application, an alternative proof of Billhardt’s λ-semidirect products is given.
Suha Wazzan
doaj   +1 more source

Amenability and Contractibility Modulo an Ideal of Banach Algebras

Abstract and Applied Analysis, 2014
We investigate the concept of amenability modulo an ideal of Banach algebra, showing that amenability modulo an ideal can be characterized by the existence of virtual and approximate diagonal modulo an ideal.
Hamidreza Rahimi, Elham Tahmasebi
doaj   +1 more source

Varieties of \u3cem\u3eP\u3c/em\u3e-Restriction Semigroups [PDF]

, 2014
The restriction semigroups, in both their one-sided and two-sided versions, have arisen in various fashions, meriting study for their own sake. From one historical perspective, as “weakly E-ample” semigroups, the definition revolves around a “designated ...
Jones, Peter R.
core   +1 more source

Abstract Boundary Delay Systems and Application to Network Flow

Mathematical Methods in the Applied Sciences, Volume 49, Issue 1, Page 119-129, 15 January 2026.
ABSTRACT This paper investigates the well‐posedness and positivity of solutions to a class of delayed transport equations on a network. The material flow is delayed at the vertices and along the edges. The problem is reformulated as an abstract boundary delay equation, and well‐posedness is proved by using the Staffans–Weiss theory.
András Bátkai, Marjeta Kramar Fijavž, Abdelaziz Rhandi   +2 more
wiley   +1 more source

A characterization of the translational hull of a weakly type B semigroup with E-properties

Open Mathematics
Recall that weakly type B semigroups are generalized inverse semigroups on semi-abundant semigroups. The main aim of this article is to prove that the translational hull of a weakly type B semigroup is still a semigroup of the same type.
Li Chunhua, Fang Jieying, Meng Lingxiang
doaj   +1 more source

Equivariant Perturbation in Gomory and Johnson’s Infinite Group Problem. VII. Inverse Semigroup Theory, Closures, Decomposition of Perturbations

Open Journal of Mathematical Optimization, 2022
In this self-contained paper, we present a theory of the piecewise linear minimal valid functions for the 1-row Gomory–Johnson infinite group problem. The non-extreme minimal valid functions are those that admit effective perturbations. We give a precise
Hildebrand, Robert, Köppe, Matthias, Zhou, Yuan   +2 more
doaj   +1 more source